1294959257 has 2 divisors, whose sum is σ = 1294959258. Its totient is φ = 1294959256.

The previous prime is 1294959223. The next prime is 1294959283. The reversal of 1294959257 is 7529594921.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1102970521 + 191988736 = 33211^2 + 13856^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1294959257 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1294959199 and 1294959208.

It is not a weakly prime, because it can be changed into another prime (1294959217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 647479628 + 647479629.

It is an arithmetic number, because the mean of its divisors is an integer number (647479629).

Almost surely, 2^1294959257 is an apocalyptic number.

It is an amenable number.

1294959257 is a deficient number, since it is larger than the sum of its proper divisors (1).

1294959257 is an equidigital number, since it uses as much as digits as its factorization.

1294959257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2041200, while the sum is 53.

The square root of 1294959257 is about 35985.5423329981. The cubic root of 1294959257 is about 1089.9804325528.

The spelling of 1294959257 in words is "one billion, two hundred ninety-four million, nine hundred fifty-nine thousand, two hundred fifty-seven".